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builtins.c (expand_builtin_memcmp): Do expansion even with !HAVE_cmpstrsi, do libcall when gen_strcmpsi fails. 

* builtins.c (expand_builtin_memcmp): Do expansion even with
	!HAVE_cmpstrsi, do libcall when gen_strcmpsi fails.

From-SVN: r33107
This commit is contained in:
Jan Hubicka 2000-04-12 14:18:56 +00:00 committed by Jan Hubicka
parent ebcd0b57fa
commit 8878e9133e
2 changed files with 24 additions and 6 deletions
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3
gcc/ChangeLog
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@ -1,5 +1,8 @@
Wed Apr 12 15:54:11 MET DST 2000 Jan Hubicka <jh@suse.cz>
* builtins.c (expand_builtin_memcmp): Do expansion even with
!HAVE_cmpstrsi, do libcall when gen_strcmpsi fails.
* calls.c (expand_call): Do NO_DEFER_POP unconditionally once
stack is propertly aligned; add sanity checking for aligned
stack pointer.

27
gcc/builtins.c
View File

@ -1628,15 +1628,15 @@ expand_builtin_memcmp (exp, arglist, target)
|| TREE_CHAIN (TREE_CHAIN (arglist)) == 0
|| TREE_CODE (TREE_TYPE (TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist))))) != INTEGER_TYPE)
return 0;
else if (!HAVE_cmpstrsi)
return 0;
{
enum machine_mode mode;
tree arg1 = TREE_VALUE (arglist);
tree arg2 = TREE_VALUE (TREE_CHAIN (arglist));
tree len = TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist)));
rtx arg1_rtx, arg2_rtx, arg3_rtx;
rtx result;
rtx insn;
int arg1_align
= get_pointer_alignment (arg1, BIGGEST_ALIGNMENT) / BITS_PER_UNIT;
@ -1656,10 +1656,25 @@ expand_builtin_memcmp (exp, arglist, target)
&& REGNO (result) >= FIRST_PSEUDO_REGISTER))
result = gen_reg_rtx (insn_mode);
emit_insn (gen_cmpstrsi (result, get_memory_rtx (arg1),
get_memory_rtx (arg2),
expand_expr (len, NULL_RTX, VOIDmode, 0),
GEN_INT (MIN (arg1_align, arg2_align))));
arg1_rtx = get_memory_rtx (arg1);
arg2_rtx = get_memory_rtx (arg2);
arg3_rtx = expand_expr (len, NULL_RTX, VOIDmode, 0);
if (!HAVE_cmpstrsi)
insn = NULL_RTX;
else
insn = gen_cmpstrsi (result, arg1_rtx, arg2_rtx, arg3_rtx,
GEN_INT (MIN (arg1_align, arg2_align)));
if (insn)
emit_insn (insn);
else
emit_library_call_value (memcmp_libfunc, result, 2,
TYPE_MODE (integer_type_node), 3,
XEXP (arg1_rtx, 0), Pmode,
XEXP (arg2_rtx, 0), Pmode,
convert_to_mode (TYPE_MODE (sizetype), arg3_rtx,
TREE_UNSIGNED (sizetype)),
TYPE_MODE (sizetype));
/* Return the value in the proper mode for this function. */
mode = TYPE_MODE (TREE_TYPE (exp));